Apparatus for regulating combustion.



No. 858,019. PATEN'IED JUNE 25, 1907.

T. D. PILGHER. I Y APPARATUS FOR REGULATING COMBUSTION.

APPLICATION FILED DEO.15, 1905.

e a 6 I B T v I I awuemtoz WMWO fit fif 4 M 46 M filitfo'cmxso combustion, from the fuel ctntained in the :UNITED STATES PATENT-OFFICE! THOMAS. J) PILCHER. or 'WASHINGTON, nis'ra'ic'r' or. COLI'IMBIA,

APPARATUS FOR REGULATING COMBUSTION.

" Specification of Letters Eatent.

I Patented JuneQIS, 1907."

Application filed December iaieosfsemrr 291,946.

TolitZZ whom, itmiay concerfi;

Be it known that I, THOMAS D. 'Piionna, a citizen of the United States, residing at Wash- 'ington, in the District-of'Columbia, have invented certainnew and usefulv Improvements in Ap ar'atus for Regulating Combus-v tion, of which the following is aspecification. y invention relates .to means'for regulatmg the combustion in the fire-places of fur: naces, stoves, etc.-, and'consists in providing the discharge fine with a central air pipe open mg toward the-fire.- lace ,asi fully set forth hereinafter and a's'il ust'rated in the ,accom enyi d awingflnlwhichcsl j F gure 1is aisectional. leyation illustrat- .21 furnace with my improvement. Fig.2

is a section showing the construction applied.

toarange.- W a p A represents aiurnac'e' or c ther structure, from which areg'discharged the productsof fire-place thereofy provided with a flue. B which may be either horizontal or vertical. Atany suitable point in the flue B is arranged an inlet ipe a parallel to the flue, concentric therewit and having its open end toward the furnace or fire-placeand communicating with the external air, as 'for instance througha branch 12 extending throu h theside of the flue. As .thusgfarranged wit --its'.mo11th open toward the furilace or fire-place, I have found that the passage-of the products'of combustion-around the outside of the pipe a results 1 i'dla forcible draft from the outside through 'eharg: to ta In order to reduce the amount of air admit- 'ted to'the'flue inproportion as the tem eraside pipe,-nnxing 'with'the products of' combustion and acting so as to secure a superior combustion of. the fuel in the fireplace,

suflicient draft, but without that disof unoonsumed gases which is liable e place under ordinary conditions. I

tureof the fire increases, 1' make use 0 any suitable regulator G connected to operate a.

Valvec, which -maybe gradually. .closed, as

' on the increase of temperature, to cut ofithe inflow of air, and in these caseswhere the device issituated so near the. furnace that thegases adjacent to thepipe a,advantage m ybe secured by enlarging the flue Bate adpacent to said pipe,

he outer end i. hebr'anch'b' of the pip-e -theinflow of air'results in .a combustion of f maybe, enlarged to form a-hood-g'andthis\ may be arranged above the furnace'or the range soas to collect'vapor or duster smoke and prevent its escape into the apartment. I havefound it to be of. importance that the pipe a shall occupy a position concentric with the flue. B,'-as otherwise there may be a lter, the pipe a should be from two; and onearranged beyond the furnace and concentric withand within said flue, the inner d scharge end votsaid pipe, extending toward the furnace, and an extension of the said. pipe projecting outward into the external atmosphere.

2-. In a'furnac'e provided with a dischargeflue, the combination with said flue, of a pipe arranged beyond the furnace and concentric with and within said flue, the'i'n'ner discharge end of said-pipe extending toward the furnace, and an extension of the said ipe pro jecting outward into the externa atmos-. phere and terminating in a hood arranged above the furnace. I

i In testimony whereof I aflix my signature in presence of twowitnes'ses. 1

' THOS. D. PILCHER,

' Witnesses: t o

' C'HAR Es E.' FOSTER','

' EJWARRENERL 

